55251313213 has 16 divisors (see below), whose sum is σ = 58114316160. Its totient is φ = 52452792000.

The previous prime is 55251313189. The next prime is 55251313217. The reversal of 55251313213 is 31231315255.

It is a cyclic number.

It is not a de Polignac number, because 55251313213 - 2²⁵ = 55217758781 is a prime.

It is a super-2 number, since 2×55251313213² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55251313217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9774438 + ... + 9780088.

It is an arithmetic number, because the mean of its divisors is an integer number (3632144760).

Almost surely, 2^55251313213 is an apocalyptic number.

It is an amenable number.

55251313213 is a deficient number, since it is larger than the sum of its proper divisors (2863002947).

55251313213 is a wasteful number, since it uses less digits than its factorization.

55251313213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11268.

The product of its digits is 13500, while the sum is 31.

Adding to 55251313213 its reverse (31231315255), we get a palindrome (86482628468).

The spelling of 55251313213 in words is "fifty-five billion, two hundred fifty-one million, three hundred thirteen thousand, two hundred thirteen".